A4 Mk3
Note| Vehicles without auxiliary heater |
| 1 - | Water radiator (front) for charge air cooling circuit |
| q | If renewed, refill system with fresh coolant |
| 2 - | Radiator |
| q | Vehicles with dual clutch gearbox: with integrated ATF cooler |
| q | If renewed, refill system with fresh coolant |
| 3 - | Coolant temperature sender -G62- |
| 4 - | Thermostat |
| 5 - | Coolant pump |
| 6 - | Charge air cooler (right-side) |
| q | In supercharger housing |
| q | If renewed, refill system with fresh coolant |
| 7 - | Coolant shut-off valve |
| q | Activated via Climatronic coolant shut-off valve -N422- |
| q | Climatronic coolant shut-off valve -N422- is activated via Climatronic control unit -J255- |
| q | Removing and installing → Rep. gr.87 |
| 8 - | Bleeder screw |
| 9 - | Cylinder head, bank 1 (right-side) |
| q | If renewed, refill system with fresh coolant |
| 10 - | Heat exchanger for heater |
| q | Removing and installing → Rep. gr.87 |
| q | If renewed, refill system with fresh coolant |
| 11 - | Bleeder hole |
| 12 - | Cylinder head, bank 2 (left-side) |
| q | If renewed, refill system with fresh coolant |
| 13 - | Bleeder screw |
| 14 - | Charge air cooler (left-side) |
| q | In supercharger housing |
| q | If renewed, refill system with fresh coolant |
| 15 - | Filler cap for expansion tank |
| q | Checking pressure relief valve → |
| 16 - | Coolant expansion tank |
| 17 - | Engine oil cooler |
| 18 - | Continued coolant circulation pump -V51- |
| q | Country-specific version |
| 19 - | Non-return valve |
| q | Located in coolant hose |
| 20 - | Charge air cooling pump -V188- |
| 21 - | Water radiator (left-side) for charge air cooling circuit |
| q | If renewed, refill system with fresh coolant |
| 22 - | Non-return valve |
| q | Located in coolant hose |
| 23 - | Non-return valve |
| q | Located in coolant hose |
| Vehicles with auxiliary heater |
| 1 - | Water radiator (front) for charge air cooling circuit |
| q | If renewed, refill system with fresh coolant |
| 2 - | Radiator |
| q | Vehicles with dual clutch gearbox: with integrated ATF cooler |
| q | If renewed, refill system with fresh coolant |
| 3 - | Coolant temperature sender -G62- |
| 4 - | Auxiliary heater |
| q | With circulation pump -V55- |
| q | Removing and installing → Rep. gr.82 |
| 5 - | Thermostat |
| 6 - | Coolant pump |
| 7 - | Charge air cooler (right-side) |
| q | In supercharger housing |
| q | If renewed, refill system with fresh coolant |
| 8 - | Bleeder screw |
| 9 - | Climatronic coolant shut-off valve -N422- |
| q | Removing and installing → Rep. gr.87 |
| q | Activated via Climatronic control unit -J255- |
| 10 - | Cylinder head, bank 1 (right-side) |
| q | If renewed, refill system with fresh coolant |
| 11 - | Heat exchanger for heater |
| q | Removing and installing → Rep. gr.87 |
| q | If renewed, refill system with fresh coolant |
| 12 - | Bleeder hole |
| 13 - | Cylinder head, bank 2 (left-side) |
| q | If renewed, refill system with fresh coolant |
| 14 - | Bleeder screw |
| 15 - | Charge air cooler (left-side) |
| q | In supercharger housing |
| q | If renewed, refill system with fresh coolant |
| 16 - | Filler cap for expansion tank |
| q | Checking pressure relief valve → |
| 17 - | Coolant expansion tank |
| 18 - | Engine oil cooler |
| 19 - | Continued coolant circulation pump -V51- |
| q | Country-specific version |
| 20 - | Non-return valve |
| q | Located in coolant hose |
| 21 - | Charge air cooling pump -V188- |
| 22 - | Water radiator (left-side) for charge air cooling circuit |
| q | If renewed, refill system with fresh coolant |
| 23 - | Non-return valve |
| q | Located in coolant hose |
| 24 - | Non-return valve |
| q | Located in coolant hose |